Thematic Mapper Sites -- note that these sites are constantly changing. Some are quite quick and easy to use others a bit more time consuming and difficult. Also, this only represents the tip of the iceberg, there is much more out there if you look.
Google Earth -- one of the newest and highest end Thematic Mappers, this is where interactive web based tools are headed.
http://earth.google.com/tour/thanks-win.html
Additional recent sites from WALL STREET JOURNAL 4/5/2006
Arizona Electronic Atlas
http://atlas.library.arizona.edu/map.html
The Perry-Castaņeda Library Map Collection, The University of Texas at Austin -- note that this site is huge and contains both true electronic atlases and thematic mappers. Be sure to choose a thematic mapper for this assignment.
http://www.lib.utexas.edu/Libs/PCL/Map_collection/map_sites/map_sites.html
Yahoo! Maps: Driving Directions
http://maps.yahoo.com/py/maps.py
Stratospheric Ozone and Human Health Project: ltraviolet Interactive Service
http://sedac.ciesin.org/prod/charlotte?state=START_UVD&event=start&protocol=ozone&charlotte_dir=prod
National Atlas of the United States
Demographic Data Viewer
http://plue.sedac.ciesin.org/plue/ddviewer/
The Harvard Geospatial Library -- quite extensive
http://hgl.harvard.edu/jsps/basemap.jsp?nrssearchOK=maybe
ArcExplorer Free GIS Data Viewer
http://www.esri.com/software/arcexplorer/index.html
Thurston County GIS data
National Oceanic and Atmospheric Administration
Climate Production Center: National Oceanic and Atmospheric Administration
http://www.cpc.ncep.noaa.gov/charts.htm
Agricultural Atlas of the United States
http://www.nass.usda.gov/census/census97/atlas97/index.htm
US Census
http://www.factfinder.census.gov